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  • SME-ICGCM
    The Use of NDT Methods to Determine the Condition of Rockbolt Support During the Recovery of a Previously Flooded Coal Mine Roadway at Thoresby Colliery

    By Brian Clifford

    Thoresby Colliery is in the process of recovering an old roadway that was flooded following the closure of an adjacent mine. The aim is to re-use the roadway as a gate road for a longwall retreat pane

    Jan 1, 2002

  • SME-ICGCM
    Vertical Stress Redistribution Around A Retreating Longwall Face End

    By D. A. Payne

    Large excavations, such as Iongwall panels, result in extensive vertical stress redistribution in the surrounding strata. The large abutment stresses developed may produce damage to pre-existing or pl

    Jan 1, 1995

  • SME-ICGCM
    Monitoring For The Evaluation Of The Stability Of Underground Openings

    By P. K. Kaiser

    The purpose of deformation monitoring for the evaluation of the stability of underground openings is reviewed briefly and some results from laboratory tests of small tunnels are presented. The ground

    Jan 1, 1981

  • SME-ICGCM
    Three-Dimensional Simulations Of The Roof Behavior In Coal Room And Pillar Panels

    By Andre Vervoort

    The roof in coal room and pillar panels is normally stratified and can be thought of as beams or plates supported by the pillar sides in the roadways and by pillar corners in the intersections Undergr

    Jan 1, 2000

  • SME-ICGCM
    Subsurface Fracture Development Due To Longwall Mining And Its Interpretation Using Image Processing Techniques (736b40e1-a21a-40c0-a678-75088df69d02)

    By Gexin Sun

    This paper presents the physical modelling results of subsurface fracture development associated with longwall mining operations and an application of image processing techniques to interpretion of th

    Jan 1, 1992

  • SME-ICGCM
    Measurement of Effects of Interaction and Influence on Mine Layout Design at Maltby Colliery

    By J. S. Oram

    Maltby Colliery, operated by RJB Mining (UK) Ltd is successfully mining the Parkgate seam in Yorkshire at a depth of 1000m using longwall retreat. Extraction in the Parkgate seam is influenced by inte

    Jan 1, 1997

  • SME-ICGCM
    Design Aspects In Multiple-Seam Mining: Case Studies

    By Gregory J. Chekan

    Developing a coal seam that has been influenced by previous mining in seams either above or below can result in severe ground control problems. In many instances, interactions between operations are i

    Jan 1, 1990

  • SME-ICGCM
    Longwall Pace Bursts and Inadequate Caving: A Came Study

    By K. Y. Haramy

    Deep coal mines with strong roof and floor strata frequently encounter face and rib bursts. The burst problem becomes more severe with increased depth. While the exact causes of bursts are often diffi

    Jan 1, 1987

  • SME-ICGCM
    Evaluation of Instrumented Cable and Rebar Bolts as Ground Support at a Trona Mine (958ba3b7-4ed1-4b81-9815-5e4d6ebd9ea2)

    By Lewis A. Martin

    Instrumented cable bolts developed at the Spokane Research Laboratory of the National Institute for Occupational Safety and Health were used in conjunction with existing ground control systems to moni

    Jan 1, 2001

  • SME-ICGCM
    An Engineering Analysis Of "Squeeze" Failure Of Pillars In The Pittsburgh Coal Bed

    By George Mishra

    In mid-1979, J&L Steel Corporation experienced rapid failure of pillars after only two weeks' operation with a combination of full retreat and partial mining in the 154 Road Section of its Nemaco

    Jan 1, 1981

  • SME-ICGCM
    Analysis Of Retreat Mining Pillar Stability

    By Christopher Mark

    Preventing pillar line squeezes, massive pillar collapses, and coal pillar bumps is critical to the safe and efficient recovery of coal during retreat mining operations. To help prevent these problems

    Jan 1, 1995

  • SME-ICGCM
    Mine Design Considerations For Surface Subsidence Control

    By John L. Edwards

    The underground coal mines in the Lake Macquarie area of the Newcastle Coalfield, New South Wales, Australia are constrained by surface subsidence restrictions as low as 150 mm. The mining environment

    Jan 1, 1993

  • SME-ICGCM
    Supercomputer Assisted Three-Dimensional Finite Element Analysis Of A Longwall Panel

    By Duk-Won Park

    The excavation of a longwall panel causes a continuous stress redistribution in the surrounding strata for every face advancement. The understanding of the behavior of rock to high level of stresses i

    Jan 1, 1989

  • SME-ICGCM
    The Influence Of Horizontal Stress On Pillar Design And Mine Layout At Two Underground Limestone Mines

    By Garth Kuhnhein

    The Black River and Maysville underground limestone mines operated by Carmeuse Lime and Stone, Inc. in northeastem Kentucky are two of the largest underground limestone operations in the United States

    Jan 1, 2004

  • SME-ICGCM
    Evaluation Of The Strength Behaviour Of Monolithic Packs (af92f0dd-9b80-4922-891e-7d098de9b5e7)

    By S. I. Al-Ameen

    Monolithic packing systems have gained in popularity as a gate side packing method, However, there has been no detailed investigation to assess their underground strength behaviour. This work includes

    Jan 1, 1992

  • SME-ICGCM
    Numerical Modeling for Increased Understanding of the Behavior and Performance of Coal Mine Stoppings

    By Lisa Burke

    In underground coal mines, concrete block stoppings are widely used to control mine ventilation. Although stoppings are not intended as roof support, they are subjected to roof to floor convergence, a

    Jan 1, 2004

  • SME-ICGCM
    Effect Of Face Advance Rates On The Characteristics Of Subsidence Processes Associated With U.S. And German Longwall Mining Operations

    By Yi Luo

    Regulating the face advance rate in longwall mining operation can be an effective means to reduce the disturbance potential to surface structures associated with a longwall subsidence process. However

    Jan 1, 2001

  • SME-ICGCM
    Geotechnical Planning and Development of the BHP Minerals San Juan Pilot Mine, Waterflow, NM

    By P. E. Christensen

    Due to ever-increasing stripping ratios associated with the No. 8 Seam at the San Juan Mine surface operation, BHP Minerals decided to implement longwall mining for the extraction of the substantial f

    Jan 1, 1998

  • SME-ICGCM
    Operational Experience With FLEXIBOLT Systems In Australian Coal Mines

    Since the initial development and trials of FLEXIBOLT flexible roof bolts, further comparative testing and product development has been completed as part of the changeover to this roof support system

    Jan 1, 1994

  • SME-ICGCM
    Effects Of Surface Topography On The Stability Of Coal Mine Openings

    By Gregory M. Molinda

    An investigation was conducted to determine the nature and frequency of coal mine roof failure beneath valleys. A mechanism for this failure, and suggestions for controlling this problem are presented

    Jan 1, 1990